search whith 2 inputs

Are you doing a search or an until?

If you are doing a search this is a Rapid Input and bypasses the ladder. They are immediate. There are control addresses for the Rapids that could be used in the ladder. But since this would be written in the ladder there is a delay as the input has to be true for two consecutive scans.

If you are doing an until then this is using universal inputs and does go through the ladder.

The rung to write in the ladder would look like:

STR# 2xxxx
OR#2xxxx
OUT#0xxxx

or

STR# 0xxxx
OR#0xxxx
OUT#0xxxx

The X's are what ever the addresses are that you are using.

I don't see what controller generation you are using. You might be able to use Structured Language also and stay out of the ladder.

IF IN#(1)=ON ORIF IN#(2)=ON THEN
WHILE...
FOR...

Quote from raynald60

hello

i think i can do the ladder cross connection
RIN3 = RIN1 or RIN2

RIN3 = RIN1 or RIN2. This can't be done. RIN's bypass the ladder. You could wire to a relay with either RIN activating the coil and have a set of contacts to go to the RIN input. If you map these in the ladder (address 80080 and 80081, I believe) you could use an universal input and the until in the robot job.

OR logic for two or more sensors may be done by simply connecting them in parallel, to the same input.
Am I missing something?

Don't think your missing anything.